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Roy Lewallen wrote:
I haven't read the article, but are different mobile antennas being compared on different vehicles, or the same vehicle? It's amazing how many people don't realize that the vehicle is fully half the antenna, and may in many cases play a more important role in determining overall radiating efficiency than the supposed "antenna". So it's impossible to draw any conclusions about mobile antennas based on comparisons done when they're mounted on different vehicles. It's as much a test of the vehicle's effectiveness as a radiator as it is the antenna's. Roy Lewallen, W7EL OK Roy you lost me. I'll confess that I'm one of those new no code guys that concentrated on the answer pool for three months in order to get an Extra Class license. What I'm trying to do now is relearn enough electronics to become a competent communicator for EMCOM purposes. You see back when I was last in radio your transmitter would keep you warm and provide enough light to read the manual by. Now it is thirty years since my Novice license expired and not only are the newer radios all solid state they do most of their signal processing digitally. By my point of view that only makes me as yet not fully trained rather than the devils personal representative in amateur radio. Are you being serious when you say that much of the difference in the mobile rigs performance may be the vehicle on which it and therefore it's antenna are mounted? IS the body of my half ton cargo van doing a substantial amount of the job of radiating my signal? If I mounted the same antenna with the same mount on my Saturn should I see a difference on a field strength meter that is the same distance to the centimeter from the antenna over the same parking lot with the antenna over exactly the same spot? -- Tom Horne, W3TDH |
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